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Table 1:

Patient characteristics

VariablePatients (n = 94)
Sex (No.)Male48
Female46
PMA at birth (weeks)aMean27.8 (SD, 2.2)
Range (min–max)23 + 3/7 to 32 + 0/7
PMA at time of scan (weeks)Mean30.9 (SD, 3.4)
Range (min–max)23 + 4/7 to 39 + 1/7
Birth weight (g)Mean1034 (SD, 349)
Range (min–max)340–1810
Birth weight percentile< 3rd (No.) (%)3 (3.2%)
3rd to 10th (No.) (%)16 (17.0%)
Head circumference at birth (cm)Mean25.3 (SD, 2.7)
Range (min–max)18.4–31.0
Head circumference at birth percentile< 3rd (No.) (%)2 (2.1%)
3rd to 10th (No.) (%)21 (22.3%)
  • Note:—Min indicates minimum; max, maximum.

  • a PMA at birth was determined by ultrasound measurement of fetal crown rump length in the first trimester.